Question

many bad things come with cars, however. for one thing, cars ______ gas in order to run, and there is only a limited amount of gas in the world. as we use more of our gas supply, it becomes more expensive to drive. also, gas releases harmful chemicals into the air when it burns. still another problem is that cars are dangerous: car accidents are the top cause of death for people between the ages of 6 and 27. cars are even dangerous for people who arent in them: in 2001, 90,000 people traveling on foot were injured by cars in the united states, and 5,800 were killed. choose the word that best fills in the blank. a require b convert c navigate d retire

Explanation:

To solve this, we analyze each option:

• Option A: "require" means to need. Cars need gas to run, which fits the context.
• Option B: "convert" means to change, which doesn't make sense here (cars don't "convert gas" to run in this context).
• Option C: "navigate" means to find a way, irrelevant to needing gas.
• Option D: "retire" means to stop working, not related.

Answer:

A. require